Driving with a Trailer in the UK: Licence Rules and Towing Technique

#The licence picture in 2026

The UK licence rules for towing have been changed twice in recent years. From January 2013 to December 2021, drivers who passed the car test (category B) on or after 1997 needed an additional B+E test to tow trailers above 750 kg with a car-and-trailer combined weight over 3500 kg. From December 2021, that requirement was removed under government deregulation; new car licence holders could tow up to 3500 kg combined without an extra test.

In 2025, the B+E test was reinstated for new licence holders following pressure from the towing industry and a rise in towing-related accidents. The current position (as of 2026) is that drivers who passed their car test before 1 January 1997 retain "grandfather rights" and can tow up to 8.25 tonnes combined without further testing. Drivers who passed after that date and want to tow trailers over 750 kg, or where the combined weight exceeds 3500 kg, need to pass the B+E test.

For drivers who passed in the deregulation window (December 2021 to 2025) and have been towing without B+E, transitional arrangements exist. The DVLA website has the current rules; check before you tow if your situation is unusual.

#Weight, MAM, and the noseweight

Three numbers matter for any towing combination. The MAM (maximum authorised mass) of the trailer is the maximum it can weigh fully loaded, stamped on the trailer plate. The car towing capacity is the maximum the car is designed to pull, found in the manual or the V5C. The noseweight is the downward force on the towball, typically 50 to 90 kg, and must not exceed either the towbar rating or the car nosweight rating.

A common trap is loading the trailer wrong. Heavy items go over the axle, not at the back. Rear-loading reduces noseweight and increases sway risk dramatically. Side-to-side balance also matters; an asymmetric load can cause the trailer to pull to one side at speed.

#Hitching up: the checks

Before every tow, work through a hitching checklist:

• Towball clean and lightly greased; cap clipped to towball when not in use
• Coupling head fully on towball, locking lever down, indicator showing locked
• Breakaway cable attached to dedicated cable point on towbar, never to the towball
• Electrics plugged in; test all lights including indicators and brake lights
• Trailer brake handle (if fitted) released; jockey wheel up and locked
• Wheel chocks removed, lashings secured, cargo strapped
• Tyre pressures correct and tread legal (1.6 mm minimum, 3 mm advised)
• Mirrors adjusted, ideally extended towing mirrors if the trailer is wider than the car

Towing mirrors are a legal requirement if the trailer obscures the car mirrors view. Most caravans require them. The fine for inadequate mirrors is £1000 in extreme cases, although usually a fixed penalty notice in practice.

#Driving technique

A trailer changes how a car behaves in three main ways. Acceleration is slower (the engine has to pull more weight). Braking distances are longer (you cannot stop a trailer on car brakes alone, even with a trailer brake). Cornering is wider (the trailer cuts inside the car on tight bends).

Practical technique:

• Anticipate further ahead; you cannot brake or accelerate as suddenly
• Take corners wider; let the front wheels run wider to bring the trailer round cleanly
• Build a bigger gap to the car in front (4 seconds dry, 8 seconds wet)
• Keep speeds modest, especially on motorway downhills where weight builds momentum
• Plan overtakes carefully; you need a much longer clear stretch than without a trailer

#Sway: cause and recovery

Trailer sway, also called snaking, is the swinging of the trailer side-to-side behind the car. Once it starts, it can build into a violent yaw that flips the trailer or jackknifes the combination. Causes include rear-loaded trailers, low noseweight, high speeds, crosswinds, and being overtaken by lorries on motorways.

Recovery is counter-intuitive. Do not steer to correct. Do not brake hard. Lift off the accelerator gently, hold the wheel straight, and let the combination slow down. The sway will damp out as speed drops. Once stable, pull over and check the load. Modern caravans often have stabilisers and electronic sway control that intervene automatically; older trailers do not.

#Reversing and parking

Reversing a trailer is the skill that takes the most practice. The basic technique: with one hand at the bottom of the steering wheel, move it in the direction you want the trailer to go. Initial movements should be small. Stop and pull forward to straighten if the angle becomes too sharp.

Practice in an empty car park before trying a campsite pitch with an audience. The B+E test includes reversing manoeuvres specifically because this is the skill drivers struggle with most.

#Caravans and high winds

Caravans are particularly vulnerable to crosswinds because of their large flat sides. The strong wind driving guide covers the basics. For caravan-specific advice: drop your speed to 50 mph on motorways and dual carriageways in moderate wind, plan to stop if the caravan begins to sway, and never tow in red weather warnings. Many UK Met Office wind warnings specifically mention caravans and high-sided vehicles.

Bridge closures are also relevant. The Severn, Forth, Humber and Queensferry crossings close to high-sided vehicles and trailers in winds typically above 50 mph. Check the bridge status before you set off if your route includes a major crossing.

#Putting it together

Towing in the UK is straightforward once you understand the licence rules, get the loading right, and develop the calmer driving style that a trailer demands. The B+E test is worth taking even if you are uncertain whether you legally need it; the structured tuition pays for itself in confidence on the road. For broader weather and condition advice, see the rain driving guide, the snow and ice guide, and the main pass guide. The Pass Plus guide and the guides library cover the wider context.